Well, since Sierra just got released in beta, and the beta releases can be quite unstable, I don’t think we’ll see any official support for it until it is released.
Of course, if we get a chance ahead of time to try it out, we’ll look into it.

Do you happen to have a callstack of something that might help us pin point the issue?

I reinstalled defold editor, and now defold.app doesn’t start at all ( all this bugs after update to MacOS Sierra, I think. error.script (37.5 KB) UPD1: As I understand it’s the same bug like https://forum.defold.com/t/crash-on-macos-sierra-def-2126/2395 What can I do now? Maybe somebody know some workaround? UPD2: it’s working when I open app using terminal open Defold.app/Contents/MacOS/Defold